The remote host is missing an update to evolution-data-server announced via advisory DSA 1321-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201321-1

It was discovered that the IMAP code in the Evolution Data Server performs insufficient sanitising of a value later used an array index, which can lead to the execution of arbitrary code. For the oldstable distribution (sarge) a different source package is affected and will be fixed separately. For the stable distribution (etch) this problem has been fixed in version 1.6.3-5etch1. For the unstable distribution (sid) this problem has been fixed in version 1.10.2-2. We recommend that you upgrade your evolution-data-server packages.